Silver solder and preparation method thereof

Abstract

The invention relates to silver solder and a preparation method thereof, in particular to the silver solder and the preparation method thereof, which are suitable for vacuum electronic devices, solar devices and electronic components. The silver solder comprises the following chemical components in percent by weight: 68.5-73.5 percent of silver, 26-29 percent of copper and 0.5-2.5 percent of nickel. The preparation method comprises the following steps: (1) a silver ingot is placed in a vacuum melting furnace proportionally, and is heated and melted under the vacuum condition, and after degasified, the silver ingot is cast into a silver ingot for later use; (2) a copper ingot and a nickel ingot are placed in the vacuum melting furnace proportionally, and are heated and melted under the vacuum condition, and after degasified, the copper ingot and the nickel ingot are cast into a copper-nickel alloy ingot for later use; (3) the prepared silver ingot and the prepared copper-nickel alloy ingot are placed in the vacuum melting furnace, and are heated and melted under the vacuum condition to obtain a silver-copper-nickel alloy melted solution, and after degasified, the silver-copper-nickel alloy melted solution is cast into a silver-copper-nickel alloy ingot for later use; and (4) the silver-copper-nickel alloy ingot is rolled into stripped silver solder or drawn into filamentous silver solder.

Description

technical field

[0001] The invention relates to a silver brazing material and a preparation method thereof, belonging to the technical field of alloy solders, in particular to a silver brazing material suitable for electric vacuum devices, solar equipment, electronic components and the like and a preparation method thereof. Background technique

[0002] At present, in the welding of various components such as electric vacuum devices, solar equipment, and electronic components, most of them use eutectic silver-copper as solder. Eutectic silver copper (AgCu28), the solder has low resistivity, excellent thermal conductivity and vacuum sealing performance, and is used in the production of anodes in electric vacuum devices such as magnetrons, traveling wave tubes, high-power emission tubes, and X-ray tubes. Brazing materials for components such as antennas, blades, and exhaust pipes can produce excellent electrical conductivity, thermal conductivity, and processability. The elec...

Examples

Embodiment 1

[0022] A method for preparing silver brazing material, comprising the steps of:

[0023] 1. Put the silver ingot with a weight percentage ratio of 68.5% into a vacuum melting furnace, and under vacuum conditions, heat the silver ingot at a temperature of 1000-1100 degrees to melt the silver ingot to obtain a silver melt. After degassing, pour it into a silver ingot for later use; The purity of silver ingots is above 99.9%;

[0024] 2. Put copper ingots with a weight percentage ratio of 29% and nickel ingots with a weight percentage ratio of 2.5% into a vacuum furnace according to the ratio. Under vacuum conditions, the heating temperature is 1400-1500 degrees to melt the copper ingots and nickel ingots , obtain copper-nickel alloy molten liquid, after degassing, cast into copper-nickel alloy ingot for subsequent use; The purity of the copper ingot is more than 99.9%; The purity of the nickel ingot is more than 99.9%;

[0025] 3. Put the above-prepared silver ingots and copper...

Embodiment 2

[0029] A method for preparing silver brazing material, comprising the steps of:

[0030] 1. Put the silver ingot with a weight percentage distribution ratio of 73.5% into a vacuum melting furnace, and under vacuum conditions, the heating temperature is 1000-1100 degrees, and melt the silver ingot to obtain a silver molten liquid. After degassing, pour it into a silver ingot for later use; The purity of silver ingots is above 99.9%;

[0031] 2. Put copper ingots with a weight percentage ratio of 26% and nickel ingots with a weight percentage ratio of 0.5% into a vacuum furnace according to the ratio. Under vacuum conditions, the heating temperature is 1400-1500 degrees to melt the copper ingots and nickel ingots , obtain copper-nickel alloy molten liquid, after degassing, cast into copper-nickel alloy ingot for subsequent use; The purity of the copper ingot is more than 99.9%; The purity of the nickel ingot is more than 99.9%;

[0032] 3. Put the above-prepared silver ingots a...

Embodiment 3

[0036] A method for preparing silver brazing material, comprising the steps of:

[0037] 1. Put the silver ingot with a distribution ratio of 72% by weight into a vacuum melting furnace. Under vacuum conditions, the heating temperature is 1000-1100 degrees, and the silver ingot is melted to obtain a silver melt. After degassing, pour it into a silver ingot for later use; The purity of silver ingots is above 99.9%;

[0038] 2. Put copper ingots with a weight percentage ratio of 27% and nickel ingots with a weight percentage ratio of 1% into a vacuum furnace according to the ratio. Under vacuum conditions, the heating temperature is 1400-1500 degrees to melt the copper ingots and nickel ingots , obtain copper-nickel alloy molten liquid, after degassing, cast into copper-nickel alloy ingot for subsequent use; The purity of the copper ingot is more than 99.9%; The purity of the nickel ingot is more than 99.9%;

[0039] 3. Put the above-prepared silver ingots and copper-nickel all...

technical field

[0001] The invention relates to a silver brazing material and a preparation method thereof, belonging to the technical field of alloy solders, in particular to a silver brazing material suitable for electric vacuum devices, solar equipment, electronic components and the like and a preparation method thereof. Background technique

[0002] At present, in the welding of various components such as electric vacuum devices, solar equipment, and electronic components, most of them use eutectic silver-copper as solder. Eutectic silver copper (AgCu28), the solder has low resistivity, excellent thermal conductivity and vacuum sealing performance, and is used in the production of anodes in electric vacuum devices such as magnetrons, traveling wave tubes, high-power emission tubes, and X-ray tubes. Brazing materials for components such as antennas, blades, and exhaust pipes can produce excellent electrical conductivity, thermal conductivity, and processability. The elec...

Examples

Embodiment 1

[0022] A method for preparing silver brazing material, comprising the steps of:

[0023] 1. Put the silver ingot with a weight percentage ratio of 68.5% into a vacuum melting furnace, and under vacuum conditions, heat the silver ingot at a temperature of 1000-1100 degrees to melt the silver ingot to obtain a silver melt. After degassing, pour it into a silver ingot for later use; The purity of silver ingots is above 99.9%;

[0024] 2. Put copper ingots with a weight percentage ratio of 29% and nickel ingots with a weight percentage ratio of 2.5% into a vacuum furnace according to the ratio. Under vacuum conditions, the heating temperature is 1400-1500 degrees to melt the copper ingots and nickel ingots , obtain copper-nickel alloy molten liquid, after degassing, cast into copper-nickel alloy ingot for subsequent use; The purity of the copper ingot is more than 99.9%; The purity of the nickel ingot is more than 99.9%;

[0025] 3. Put the above-prepared silver ingots and copper...

Embodiment 2

[0029] A method for preparing silver brazing material, comprising the steps of:

[0030] 1. Put the silver ingot with a weight percentage distribution ratio of 73.5% into a vacuum melting furnace, and under vacuum conditions, the heating temperature is 1000-1100 degrees, and melt the silver ingot to obtain a silver molten liquid. After degassing, pour it into a silver ingot for later use; The purity of silver ingots is above 99.9%;

[0031] 2. Put copper ingots with a weight percentage ratio of 26% and nickel ingots with a weight percentage ratio of 0.5% into a vacuum furnace according to the ratio. Under vacuum conditions, the heating temperature is 1400-1500 degrees to melt the copper ingots and nickel ingots , obtain copper-nickel alloy molten liquid, after degassing, cast into copper-nickel alloy ingot for subsequent use; The purity of the copper ingot is more than 99.9%; The purity of the nickel ingot is more than 99.9%;

[0032] 3. Put the above-prepared silver ingots a...

Embodiment 3

[0036] A method for preparing silver brazing material, comprising the steps of:

[0037] 1. Put the silver ingot with a distribution ratio of 72% by weight into a vacuum melting furnace. Under vacuum conditions, the heating temperature is 1000-1100 degrees, and the silver ingot is melted to obtain a silver melt. After degassing, pour it into a silver ingot for later use; The purity of silver ingots is above 99.9%;

[0038] 2. Put copper ingots with a weight percentage ratio of 27% and nickel ingots with a weight percentage ratio of 1% into a vacuum furnace according to the ratio. Under vacuum conditions, the heating temperature is 1400-1500 degrees to melt the copper ingots and nickel ingots , obtain copper-nickel alloy molten liquid, after degassing, cast into copper-nickel alloy ingot for subsequent use; The purity of the copper ingot is more than 99.9%; The purity of the nickel ingot is more than 99.9%;

[0039] 3. Put the above-prepared silver ingots and copper-nickel all...